Caption: Carpal tunnel syndrome examination. Medical practitioner examining the hand of a patient with symptoms of carpal tunnel syndrome (CTS) during a consultation at a general practice (GP) clinic. In the background is a medical textbook with information on the condition. Carpal tunnel syndrome is caused by the median nerve from the arm being trapped by bones and ligaments in the wrist. It can cause pain and numbness in the fingers, and can affect hand and wrist function. In severe cases, the ligament trapping the nerve may be surgically cut to treat the condition. Photographed in Edinburgh, Scotland.